Nut-lock.



F. SMITH.

NUT LOCK.

APPLICATION FILED 020.2.1914. RENEWED APR.3,1916.

1,199,031., 'PatentedSept. 19,1916.

FRANK SMITHQOF SACRAMENTO, CALIFORNIA.

NUT-LOCK.

Specification of Letters Patent. A Patented Spt. 19,1916.

Application filed December 2, 1914, Serial No. 875,185. Renewed Apri13, 1916. Serial No. 88,755.

To all whom it may concern:

Be it known that I, FRANK SmTH,,a citizen of the United States, residing at Sacramento, in the county of Sacramento and State of California, have invented certain new and useful Improvements in Nut- Locks, of which the following is a specification.

My invention relates to improvements in nut locks capable of service in fastening the fish plates used in connecting the meeting ends of rails, but also constructed for any vehicle, and for use in any location where an efiicient, reliable and practical nut-lock would be required.

The object of the invention is the provision of a nut-lock of the'simplest and cheapest construction, plied to the bolt'and which will positively lock the nut at any desired place upon the bolt and which in the event of any tendency to unscrewing or working loose will cause.

a secure locking leaving the bolt.

Another object of my invention is the rovision of a nut-lock which can be 100 ed by screwing the-nuts home and which will also lock upon the unscrewing of one nut, wherebythe nuts cannot possibly become accidentally unlocked or released.

To attain the desired objects my invention consists of a nut-lock embodying novel fea turesof construction and combination of parts for service, substantially as shown, de-' scribed and claimed herein.

Figure 1 represents a side elevation of a nut-lock constructed in accordance with and embodying my invention. Fig. 2 represents a vertical sectional view showing the nuts only in locked relation. Figs. 3 and 4 repre-. sent side views of the pair of nuts constructed in accordance with my invention, and Fig. 5 is a sectional view of a modified construction of my nut-lock.

Referring by numerals to the drawing, the numeral 1 designates the bolt, 2 the inner and prevent the nuts from a nut screwed upon the bolt and formed on one side with the projection or head 3, said. projection or head being formed with splits '4 to divide the head into a series of elastic portions adapted to fit the cavity or seat 5, in the outer nut 6, whereby when the outer nut is screwed home or screwed out on prowhich can be instantly apthreads bite into the threads of the bolt,

causing a locking actlon between said bolt and nuts. Thelockiiig action, it will be understood, occurs either when. the outer nut is screwed'home or screwed outward or when any tendency to unscrew or work loose occurs, thus making it absolutely impossible 1flor the nuts to become unlocked after they ave allowing the nut-lock to lock two ways either in or out'as described. 'The splits or slots 4 are formed with the flaring or enlarged portions 4, which gives. a greater spring or elastic action to the series of elastic portions and'insuresa greaterefiiciency in the operation of the nut lock. 7

Itwill be understood that my nut-lock can be used upon. railroad railsorin any been screwed home upon the bolt,

other situation where it could perform-its functions and that it embodies the requisites of cheapness, simplicity and durability and at the same time, exactly after. the manner of a single nut which insures efiiciency and a saving of time.

The important feature of my nut lock resides in the locking action occurring either when the nuts are screwed inward or outward with reference to each other, and in both instances there is a space between the nuts to allow the binding or cam actionbetween the cavity of one nut and the spling nut locking portions of the otherfnut' I claim:

A nut lock, consisting of a nut a projection formed with splits to provide a series of spring portions, and a nut having a cavity provided with means to'force said spring portions inwardly upon either outward or inward movement of said nuts relative to each other to effect the lockingof the nuts. In testimony whereof I aflixmy signature in presence oftwo witnesses.

FRANK SMITH. Witnesses; 5

JOHN E.Pmcn, I H. W. Oorsm.

to receive said projection, and e 

